Turbine shaft and method for producing a turbine shaft
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United States of America Patent
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Feb 26, 2002
Issued Date -
N/A
app pub date -
Aug 31, 1998
filing date -
Feb 29, 1996
priority date (Note) -
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Abstract
A turbine shaft, in particular for a steam turbine, is oriented along an axis of rotation. The turbine shaft has a first region with a maximum radius R.sub.1 and a second region adjoining the first region and having a maximum radius R2>R1. The first region includes a first base material for use at a temperature of over 550.degree. C. and the second region includes a second base material for use at a temperature below 550.degree. C. An alloy steel used for the first and the second base materials in each case has a chromium content of between 8.0% by weight and 12.5% by weight at a substantially identical austenitizing temperature. A method is provided for producing the turbine shaft.
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